Extrinsic 19007-1

{
  "heartbeat": {
    "blockNumber": 19006,
    "sessionIndex": 316,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x82f30a95505105f94269acb80058fc9f9948ac435773f6d2242372f4fd9f22578454580af76d3b71add44366e52981b4701361fe711aaebdbe361d2a6fb6198d"
}